An archive of repair files for Xiaomi hardware. Shared as “@Mrepairo_Poco_X3_NFC_karna_Reset_EFS_Mi_Assistant_Only_Android.zip” — a .zip file, 3.90 MB.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @mrepairo. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip